JPS6137966Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a so-called bypass mixing system in which a bypass passage is provided that bypasses the heat exchanger and leads to the hot water outlet, and a temperature control valve is provided in the bypass passage so that the temperature of the hot water that comes out can be adjusted. Regarding instantaneous water heaters.

Conventionally, as shown in FIG. 1, a diaphragm a divides the high pressure chamber b into a low pressure chamber c, and the high pressure chamber b is communicated with a water inlet passage e through a narrow passage d, and the water inlet passage e is connected to the diaphragm a. A water governor g facing a communicating water pressure control valve f, a main passage i that supplies water whose water pressure is adjusted by the water governor g to a heat exchanger h, and hot water heated by the heat exchanger h. and a bypass passage k that bypasses the heat exchanger h and communicates the high pressure chamber b and the tap j.
and a temperature control valve n facing the bypass passage k, a ventilator part n provided in the main passage i, and a ventilator part l communicated with the low pressure chamber c, for example, as disclosed in Utility Model 51- Known from Publication No. 1095. However, in this system, when the temperature control valve n is opened and water is supplied to the bypass passage K, the amount of water flowing through the heat exchanger h decreases, causing problems such as generation of steam within the heat exchanger h.

For this purpose, a correction passage m is provided which communicates with the downstream side of the ventilary portion l of the main passage i through a temperature control valve n, and correction water is supplied to the heat exchanger h via the correction passage m. That's what I do.

For this reason, the temperature control valve n and the ventilator section l
This poses design difficulties as the positional relationship with the

The present invention was developed in view of the current situation, and is divided into a high pressure chamber 2 and a low pressure chamber 3 by a diaphragm 1, the high pressure chamber 2 is communicated with a water inlet passage 4, and the diaphragm 1 is connected to the water inlet passage 4. a water governor 6 facing a water pressure regulating valve 5 linked to the water governor 6; a main passage 8 supplying water whose water pressure is adjusted by the water governor 6 to a heat exchanger 7; A hot water outlet 9 for discharging hot water, a bypass passage 11 that bypasses the heat exchanger 7 and communicates the high pressure chamber 2 and the hot water outlet 9 via a temperature control valve 10, and the bypass passage 1.
1, a ventilary part 12 is provided in the main passage 8, and the low pressure chamber 3 is communicated with the ventilary part 12, which is divided by the diaphragm 1. The temperature control valve 10 has an opening 10a connecting a connecting pipe 13 connected to the low pressure chamber 3 and an opening 10b connected to the bypass passage 11. Installed valve case 10c
A valve body 10 is rotatably operated by an operating shaft 10d.
e, and the openings 10a, 10 are provided in the valve body 10e.
A through hole 10f, 1 as shown in FIG.
0g, and by operating the operating shaft 10d, the amount of water flowing through the bypass passage 11 and the pressure inside the low pressure chamber 3, which will be described later, can be adjusted.

The connecting pipe 13 connected to the low pressure chamber 3 is connected to the low pressure chamber 3 through a passage 14 connecting the low pressure chamber 3 and the ventilary part 12, as shown in FIG.
The connection position is selected depending on the conditions of the installation part, such as direct communication with the low pressure chamber 3 as shown in the figure, and further communication through the connecting part of the passage 14 of the ventilary part 12 as shown in FIG.

Next, the operation of this device will be explained.

When the hot water tap (not shown) provided at the outlet 9 is opened, water in the main passage 8 creates a pressure difference between the high pressure chamber 2 and the low pressure chamber 3 in the ventilate section 12, and the diaphragm 1 responds to the low pressure. Move to the chamber 3 side, and accordingly throttle the water inlet passage 5 with the water pressure control valve 5.
Keep water pressure constant. The water whose water pressure has been adjusted is supplied to the heat exchanger 7 through the main passage 8, and the hot water heated by the heat exchanger 7 is discharged from the outlet 9.

When the temperature control valve 10 is opened to adjust the temperature of the hot water to be discharged, a portion of the water supplied via the water inlet passage 4 via the temperature control valve 10 flows into the bypass passage 11 and also flows into the high pressure chamber 2. Since the low pressure chamber 3 and the low pressure chamber 3 are communicated with each other via the temperature control valve 10, the pressure on the low pressure chamber 3 side increases accordingly. When the pressure in the low pressure chamber 3 increases, the diaphragm 1 moves toward the high pressure chamber 2, and the water pressure control valve 5 moves in a direction to release the restriction. Therefore, the pressure on the high pressure chamber 2 side increases, and the amount of water flowing through the main passage 8 can be prevented from decreasing accordingly.

As described above, according to the present invention, the high pressure chamber 2 and the low pressure chamber 3 separated by the diaphragm 1 are connected through the temperature control valve 10 in a very simple manner, and the temperature control valve 10 is operated to control the tap water outlet 9. It is possible to prevent a decrease in the amount of water on the heat exchanger 7 side that occurs when adjusting the temperature of hot water discharged from the heat exchanger, and in particular, as in the conventional example, a high pressure chamber is interposed in the main passage 8 via the temperature control valve 10. A correction passage on the downstream side of the ventilator part 12 is not required, thereby eliminating the inconvenience of restricting the positional relationship between the temperature control valve 10 and the ventilator part 12, thereby increasing the degree of freedom in design. It has the effect of being removed.

[Brief explanation of drawings]

In the drawings, Fig. 1 is a cross-sectional view showing a conventional example, Fig. 2 is a cross-sectional view of an example of the implementation of the present invention, Fig. 3 and Fig. 4 are variations thereof, and Fig. 5 shows the temperature shown in Fig. 2. FIG. 6 is a cross-sectional side view of the control valve, taken along the line -2. 1...Diaphragm, 2...High pressure chamber, 3...Low pressure chamber, 4...Water inlet passage, 5...Water pressure control valve, 6
... Water governor, 7 ... Heat exchanger, 8 ... Main passage,
9... Outlet, 11... Bypass passage, 10...
Temperature control valve, 12... ventilate section.

Claims (1)

[Scope of utility model claims] A water governor 6 which is divided into a high pressure chamber 2 and a low pressure chamber 3 by a diaphragm 1, communicates the high pressure chamber 2 with a water inlet passage 4, and has a water pressure control valve 5 interlocked with the diaphragm 1 facing the water inlet passage 4. and the water governor 6
a main passage 8 for supplying water whose water pressure has been adjusted by the heat exchanger 7 to the heat exchanger 7; a hot water outlet 9 for discharging hot water heated by the heat exchanger 7; 2 and the outlet 9 via a temperature control valve 10, and a temperature control valve 10 facing the bypass path 11, and a bench lily portion 12 is provided in the main passage 8, An instantaneous water heater of the type in which the low pressure chamber 3 is communicated with the bench lily portion 12, and both water chambers 2 and 3 separated by the diaphragm 1 are communicated via the temperature control valve 10.